"Wow, guess I'm not a Yankees fan anymore. ?? LETS GO METS? Man you can't trust nobody these day. smh," Fitty wrote on Instagram Wednesday under a picture of Jeter.

The then-Yankees captain signed a three-year deal in 2011 to be a director of the company and agreed to participate in major publicity events, the suit alleges.

When Frigo signed rapper 50 Cent, pictured, as a brand ambassador, Jeter tried to distance himself even more, fearing Fitty’s involvement would make the undies too “urban,” according to the suit. (Jefferson Siegel/POOL)

But the baseball great allegedly got his knickers in a bunch in 2013, telling the owners he didn't want his relationship with the company made public during its U.S. launch. When Frigo signed 50 Cent as a brand ambassador a year later, Jeter — who is biracial — tried to distance himself even more, fearing Fitty's involvement would make the undies too "urban," according to the suit.